Between Two Castles of Mad King Ludwig: Secrets & Soirees ExpansionExpansion

From BoardGameGeek:

The king is throwing a party and inviting all the neighbors! This expansion to Between Two Castles of Mad King Ludwig expands the game up to 8 players with two new room types (activity and secret rooms), a new specialty room type (ballrooms), more bonus cards, and a new throne room. Would you rather party alone? This box also includes an Automa solo mode for the base game and the expansion, as well as optional rules for a new mode of play for 2-8 players in which you build your own castle instead of sharing one with your neighbors. -description from the publisher